No Mercy Wrestling Team Singlet featuring Red Dragon on Blue Singlet. Battle Tek Singlets are made of 100% Polyester with a blend of 98% Lycra and 2% Spandex. Please refer to the sizing chart for the best fit. If you are on the border of a size, take account for how much weight you put on each year. If minimal, go with the smaller size. If adding weight is frequent, you may want to go with the larger size.